(57) Along a running path of warp there are provided two hot air circulating and exhausting
systems (1a,1b) for circulating air and exhausting a part of the hot air outside each
comprising a drying chamber (4a,4b), through which hot air flows in the direction
opposite to that of the running warp (3), and a hot air blower unit (2a,2b). An exhausted
air recovering duct is provided to connect between the upstream hot air blower unit
(2a) and the downstream system for sending exhausted hot air from the downstream system.
Both of the drying chambers (4a,4b) in the upstream and downstream systems are connected
with each other so that the warp (3) is allowed to run through the connected portion
with the chambers (4a,4b) being isolated from external air. In the drying chamber
(4a) in the upstream system, there is provided an air flow resister for reducing the
cross sectional area of the passing hot air flow in a hot air path between a hot air
outlet opening (13) and a hot air inlet opening (14).
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